Gulls & Terns in Roscommon
Our list for Roscommon has 6 gulls & terns recorded regularly there: 1 resident, 1 summer visitor, 2 passage migrants and 2 scarce visitors
All 6, most common first
Black-headed GullChroicocephalus ridibundusSummer visitorCommon38–44 cmRegularly Mar–Sep
Lesser Black-backed GullLarus fuscusPassage migrantCommon52–64 cmRegularly Mar–Jul
Common TernSterna hirundoPassage migrantCommon31–35 cmRegularly Jun
European Herring GullLarus argentatusResidentCommon55–67 cmRegularly May
Common GullLarus canusScarceCommon40–46 cm
Great Black-backed GullLarus marinusScarceCommon64–79 cm
Smallest to largest
Length, cm- Common Tern 31–35 cm
- Black-headed Gull 38–44 cm
- Common Gull 40–46 cm
- Lesser Black-backed Gull 52–64 cm
- European Herring Gull 55–67 cm
- Great Black-backed Gull 64–79 cm
Body length, bill to tail. Rare birds in grey.
Data: EOD – eBird Observation Dataset (Cornell Lab of Ornithology), accessed via GBIF.org, CC BY 4.0. Records from 2019–2024, aggregated and filtered by Birdfact. How these lists are made